The FP7 is basically a replacement for the Soviet S300 missiles. Ukraine still has a lot of those systems around and they work decently well, but they can not make new missiles for them. However making a good interceptor missile is really hard. So they start to produce a simpler ground attack version now, so they can then change the production line to interceptor production later. Btw the S300 can also do ground attack.
The FP7 is basically a replacement for the Soviet S300 missiles. Ukraine still has a lot of those systems around and they work decently well, but they can not make new missiles for them. However making a good interceptor missile is really hard. So they start to produce a simpler ground attack version now, so they can then change the production line to interceptor production later. Btw the S300 can also do ground attack.